Electric welder.



E. A. BUGKMAN.

momo wanen. PLICTWN FILED SEPT.\9,1914 l220,59'8. Patentfd Mur. 2T, 1917.

2 SHEETS- SHEET l.

UNITED STATES PATENT OFFICE.

EDWARD A. BUCKMAN, OF WALKEBVILLE, ONTARIO, CANADA, ASSIGNOR OF ONE-HALF T0 ELIAS H. SELLERS.

ELECTRIC WELDE-R.

To all whom it may concern.'

Be it known that I, Enwano A. BUCKMAN, a citizen of the United States, residing in l'Valker'ville, in the county of `Essex, Province of Ontario, in the Dominion of Canada, have invented certain new and useful Improvcments in Electric W'elding Apparatus, of which the following is a specification.

My invention relates to improvements in electric welding devices and more particularly to a combined butt andspot welding apparatus. One of the salient objects of my invention is to provide an electric Welder structure which shall combine the mechanical features of a spot Welder and a butt weldcr in one mechanical unit or mechanism, which is simple, efficient, and rapid in operation. A further object of my invention is to' provide a vertically rotative welding head, or mechanism, which will permit the sliding or-reci rocating movement of the electrodes to be clianged from a horizontal to a vertical plane without disturbing the mechanical or electrical efficiency of the apparatus, and. other and further objects of my invention will become apparent Vto those skilled inthe art from the following description, taken in, conjunction with the accompanying drawings in which:

Figure 1. is a front elevation, or view of the invention, showing the rotative welding mechanism in a horizontal position, as adapted to the purpose of butt welding metal bars or other metal objects. Fig. 2. is a cross section of Fig. 1. on the lines 2 2. showing the relative construction and action of the component parts of the invention.

Fig. 3. is a side view of the invention as arranged or converted to spot welding purposes, the rotating head in a vertical posi.- tion, and the detachable horns or arms in proper operative position. Fig. 4. is a perspective of one of the detachable horns or arms, 'which are prominent features of this invention; Fig. 5. is a view of a complete electric Welding apparatus embodying the invention as operated in butt welding, and Fig. 6. shows the same apparatus, the rotative head in a vertical position, and converted to spot welding purposes by means of the foot pedal and connecting rod, and having the detachable horns ripped and held in operative position by t e electrodes and Specification of Letters Patent Patented Mar. 27, 1917.

aerial N.-se2,57a.

lclamping j rws of the butt welding mechamsm.

Throughout the different views, like numerals of rf :ference refer always m like parts.

In the crawings wherein my i-nvproveh ments are shown as embodied -in aA -flectric combined Vbatt and spot weldingr apparatus,

former support; 5, which is rifridly attached to said trun 'lion as shown in lig. 2; an axis is thereby provided, upon which the head 4 and supporl 5 may be rotated in a vertical plane, carrying with them the transformer and other members of the mechanism as a unit, rotatable in a verticalplane when desired. v

Parallel w ays are provided upon the'head 4, whcrcon are mounted the reciprocating carriage member 18 and the adjustable carriage member 13, which are hell" in place upon the said ways by-the 'bs and 14 the electrode; 7 and 7 are a justably secured to the carriage members 18 and 13, and, by

- means of t-he adjusting screws 19 and 19 may be moved in aplane transverse ,to the movement of the carriage members, as may be seen in Fig. l. i

The electrodes are'rccessed at their outer ends to receive the dies 8 and 8 which are; gripped by the die holders 9 and 9 respectively, the in ier ends of the electrodes being suitably connected to the terminals of tlie transformer through the openingl inthe head 4.

The clamp heads indicated at 11 and 11 l are secured t) the carriage members 13 and 18 above, and in alinement with, the dies 8 -and 8 and by means of the adjusting screws 17 and 17 m my be raised or lowered to permit objects o1 various size to be gripped and held in true 1nd firm contact with the dies by means of the clamping jatvs 10 and 10 which are act aated by the cam levers 12 and 12 respective ly; referring to Fig. 2 vit will be seen that if the lever 12 be moved forward, its lou er end will engage the awl upon the clamping jaw 10. and cause 1t t0 rise, while a reverse movement will force the jaw down to grip an object placed upon the die 8. c

Tol operate the invention as a butt Welder, the mechanism is rotated upon its axis `until the. head 4 assumesma horizontal pos1tion, as shown in Figs. 1 and 5; thc objects to be Kwelded are placed in proper position upon.

the copper dies 8 and. 8 and gripped rmly by the steel clamping jaws l() and 10 pressure being applied by the levers 12 and 12', the work so gripped being indicated at 31-32 in Fig. 5, and currents of electricity are admitted to the transformer 6 by a properly constructed switch,` provided for this purpose; when the objects to be welded have become-sufiiciently heated, the weld is completed by forcin the parts together, pressure being applied by the lever 23 through the ram lever 22 and shaft 2l to the toggle action shown at 20, which moves the carriage member 18 and completes-the weld.

The invention may -be operated as a spot welder with very few changes, as shown in Fig. 6; the copper dies may be removed and the detachable spot welding-horns 25 and 25 inserted and clamped in operative position by the jaws 10 and 10', and the mechanism rotated until the head 4 assumes a vertical position, and is locked by the latch 26. The lever 23 may be disconnected and thrown back upon the casing 3 and a connecting rod 28 attached to the ram lever 22 and pivoted at its lower end to a foot pedal 129 equipped' with a lifting spring 30, as in Objects of sheet metal to be welded may now be placed between the copper die points 2!) and 29 as indicated at 31*32 Fig. 6.

Pressure and electricity may be applied by means of the foot pedal and switch as in butt welding.

lVhile I have herein described in some detail an embodiment of my invention and the action' thereof, which I have found to be practical and advantageous, it will be ap parent to those skilled in thc art that numight be made withoutdeparture from the spirit and scope of my invention.

Having thus described my invention,

what I claim and desire to secure by Letters Patent, of the United States, is:

1. In an electric welding apparatus, a supporting member, a welding head journaled to rotate in said member and having welding electrodes movably mounted thereon, an electric transformer carried by said head to rotate therewith and electrically connected with said electrodes.

2. In an electric welding apparatus, a supporting case, a welding head journaled to rotate in said case, clamping jaws carrying welding electrodes movably mounted on said head, an electric transformer mounted on said head to rotate therewith and electrically connected with said electrodes.

3. In an electric welding apparatus, a supporting frame having a casing, a welding head Journaled to rotate in said casing, a transformer mounted on said head and embraced by said casing, an adjustable carriage carrying clamping jaws and a, welding electrode mounted on said head, a carriage carrying a welding electrode movably mounted on said head and movable toward and from said adjustable carriage, and electriq conductors respectively connecting said transformer with said electrodes.

4. In an electric welding apparatus, a supporting member, a welding head journaled to rotate in saidmember and having electrodes movably mounted thereon, spotwelding arms detachably connected to Said electrodes and movable therewith, an electric transformer carried by lsaid head to rotate therewith and electrlcally connected with said electrodes.

In testimony hand in the presence of two witnesses.

ED'WARD A. BUCKMAN. Witnesses:

JOHN GRnmsoN, Hama GnIMAsoN.

whereof I hereunto set my` 

